Happy Phone Number provides easy methods to format phone numbers from your Rails models. Virtually any country specific format or convention could be supported, including national and international format. For the not (yet) supported countries, a general method using a simple mask is also provided.
libcraigscrape is an easy library to do the heavy lifting between you and Craigslist's posting database. Given a URL, libcraigscrape will follow links, scrape fields, and deduce Ruby objects out of the raw HTML from Craigslist's servers. libcraigscrape was primarily developed to support the included craigwatch script.
Ruby appscript (rb-appscript) is a high-level, user-friendly Apple event bridge that allows you to control scriptable MacOS X applications using ordinary Ruby scripts. It is a port of the powerful, mature Python appscript package, making Ruby a serious alternative to Apple's own AppleScript language for automating your Mac.